Recent chapters (as of the latest fan translations) show Yuna noticing inconsistencies. Why does her son flinch when the Bully enters the room? Why are there bruises on the Bully's knuckles? Why does the Bully smirk whenever her son leaves the dinner table?
If you are looking for the most current version or detailed changelogs, the following community and developer hubs are the primary sources: my bully tries to corrupt my mother yuna introv updated